Nitrogen cycle
Nitrogen cycle
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AMMONIA
AMMONIFICATION
ATMOSPHERE
DENITRIFICATION
LEGUMES
LIGHTNING
NITRATES
NITRIFICATION
NITRITES
PROTOPLASM
| Y | Z | S | J | H | I | W | A | I | N | O | M | M | A | D |
| R | D | D | W | E | T | Z | S | A | X | W | U | P | E | G |
| P | Y | G | V | R | Y | J | Y | M | O | H | W | N | Y | N |
| C | P | L | A | E | V | C | D | M | R | H | I | I | E | I |
| L | F | E | C | H | W | Z | S | O | P | T | X | T | C | N |
| H | F | G | F | P | J | U | V | N | R | C | G | R | N | T |
| I | E | U | R | S | S | O | C | I | O | U | U | A | B | H |
| S | H | M | T | O | D | C | F | F | T | T | M | T | Y | G |
| E | L | E | X | M | G | I | I | I | O | C | P | E | K | I |
| T | Z | S | L | T | C | K | Z | C | P | F | V | S | R | L |
| I | Q | U | Z | A | Y | J | J | A | L | G | L | Y | H | C |
| R | D | K | T | Y | U | D | C | T | A | S | L | D | X | K |
| T | C | I | H | P | M | U | A | I | S | V | Q | F | K | Y |
| I | O | P | G | Q | P | Z | U | O | M | U | A | I | D | I |
| N | A | E | Q | X | Q | Z | U | N | O | P | U | P | L | R |
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